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Differences What are the advantages of each

Front view of Mobility Radeon HD 4850 X2

Reasons to consider the
ATi Mobility Radeon HD 4850 X2

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Is dual GPU Yes vs No About half of graphics cards are dual GPU
Higher memory bandwidth 179.2 GB/s vs 98.5 GB/s More than 80% higher memory bandwidth
Significantly more shading units 1,600 vs 192 1408 more shading units
Slightly more memory 2,048 MB vs 1,024 MB 2x more memory
Better floating-point performance 1,600 GFLOPS vs 691.2 GFLOPS More than 2.2x better floating-point performance
More texture mapping units 80 vs 32 48 more texture mapping units
Slightly higher pixel rate 16 GPixel/s vs 7.2 GPixel/s Around 2.2x higher pixel rate
More render output processors 32 vs 24 8 more render output processors
Wider memory bus 512 bit vs 192 bit Around 2.8x wider memory bus
Front view of GeForce GTX 550 Ti

Reasons to consider the
Nvidia GeForce GTX 550 Ti

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Significantly higher clock speed 900 MHz vs 500 MHz 80% higher clock speed
Higher effective memory clock speed 4,104 MHz vs 2,800 MHz More than 45% higher effective memory clock speed
Higher memory clock speed 1,026 MHz vs 700 MHz More than 45% higher memory clock speed

Features Key features of the Mobility Radeon HD 4850 X2  vs GeForce GTX 550 Ti 

memory bandwidth Rate at which data can be read from or stored in onboard memory

pixel rate Number of pixels a graphics card can render to the screen every second

texture rate Speed at which a graphics card can perform texture mapping

floating point performance How fast the gpu can crunch numbers

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Specifications Full list of technical specs

gpu

Mobility Radeon HD 4850 X2  vs
GeForce GTX 550 Ti 
GPU brand ATI Nvidia
GPU name M98 GF116
Market Laptop Desktop
Clock speed 500 MHz 900 MHz
Is dual GPU Yes No
Reference card None None

raw performance

Shading units 1,600 192
Texture mapping units 80 32
Render output processors 32 24
Pixel rate 16 GPixel/s 7.2 GPixel/s
Texture rate 40 GTexel/s 28.8 GTexel/s
Floating-point performance 1,600 GFLOPS 691.2 GFLOPS

memory

Mobility Radeon HD 4850 X2  vs
GeForce GTX 550 Ti 
Memory clock speed 700 MHz 1,026 MHz
Effective memory clock speed 2,800 MHz 4,104 MHz
Memory bus 512 bit 192 bit
Memory 2,048 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 179.2 GB/s 98.5 GB/s

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